From aa74fa2fb5acf54bd46ad4c1b10e0a23a2cb3d25 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Thu, 4 Nov 2021 18:45:11 +0100
Subject: [PATCH] fix build with 32-bits kernel

Use div_s64 or div_s64_rem to fix the following build failure on 32-bits
kernels:

ERROR: modpost: "__divdi3" [/home/fabrice/buildroot/output/build/dahdi-linux-5c840cf43838e0690873e73409491c392333b3b8/drivers/dahdi/xpp/xpp_usb.ko] undefined!
ERROR: modpost: "__udivdi3" [/home/fabrice/buildroot/output/build/dahdi-linux-5c840cf43838e0690873e73409491c392333b3b8/drivers/dahdi/xpp/xpp_usb.ko] undefined!
ERROR: modpost: "__moddi3" [/home/fabrice/buildroot/output/build/dahdi-linux-5c840cf43838e0690873e73409491c392333b3b8/drivers/dahdi/xpp/xpp.ko] undefined!
ERROR: modpost: "__divdi3" [/home/fabrice/buildroot/output/build/dahdi-linux-5c840cf43838e0690873e73409491c392333b3b8/drivers/dahdi/xpp/xpp.ko] undefined!

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Upstream: https://github.com/asterisk/dahdi-linux/pull/32
---
 drivers/dahdi/xpp/xbus-core.c    |  9 ++++++---
 drivers/dahdi/xpp/xbus-pcm.c     |  4 ++--
 drivers/dahdi/xpp/xbus-sysfs.c   |  2 +-
 drivers/dahdi/xpp/xframe_queue.c | 15 ++++++++++-----
 drivers/dahdi/xpp/xpp_usb.c      |  2 +-
 5 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/dahdi/xpp/xbus-core.c b/drivers/dahdi/xpp/xbus-core.c
index fc4ce7b..b1d1fd7 100644
--- a/drivers/dahdi/xpp/xbus-core.c
+++ b/drivers/dahdi/xpp/xbus-core.c
@@ -1754,11 +1754,14 @@ out:
 
 static void xbus_fill_proc_queue(struct seq_file *sfile, struct xframe_queue *q)
 {
+	s64 msec = 0;
+	s32 rem = 0;
+
+	msec = div_s64_rem(q->worst_lag_usec, 1000, &rem);
 	seq_printf(sfile,
-		"%-15s: counts %3d, %3d, %3d worst %3d, overflows %3d worst_lag %02lld.%lld ms\n",
+		"%-15s: counts %3d, %3d, %3d worst %3d, overflows %3d worst_lag %02lld.%d ms\n",
 		q->name, q->steady_state_count, q->count, q->max_count,
-		q->worst_count, q->overflows, q->worst_lag_usec / 1000,
-		q->worst_lag_usec % 1000);
+		q->worst_count, q->overflows, msec, rem);
 	xframe_queue_clearstats(q);
 }
 
diff --git a/drivers/dahdi/xpp/xbus-pcm.c b/drivers/dahdi/xpp/xbus-pcm.c
index 8bb2fe7..e690ce7 100644
--- a/drivers/dahdi/xpp/xbus-pcm.c
+++ b/drivers/dahdi/xpp/xbus-pcm.c
@@ -129,7 +129,7 @@ static int xpp_ticker_step(struct xpp_ticker *ticker, const ktime_t t)
 		usec = ktime_us_delta(ticker->last_sample,
 					ticker->first_sample);
 		ticker->first_sample = ticker->last_sample;
-		ticker->tick_period = usec / ticker->cycle;
+		ticker->tick_period = div_s64(usec, ticker->cycle);
 		cycled = 1;
 	}
 	ticker->count++;
@@ -497,7 +497,7 @@ static void send_drift(xbus_t *xbus, int drift)
 	XBUS_DBG(SYNC, xbus,
 		 "%sDRIFT adjust %s (%d) (last update %lld seconds ago)\n",
 		 (disable_pll_sync) ? "Fake " : "", msg, drift,
-		 msec_delta / MSEC_PER_SEC);
+		 div_s64(msec_delta, MSEC_PER_SEC));
 	if (!disable_pll_sync)
 		CALL_PROTO(GLOBAL, SYNC_SOURCE, xbus, NULL, SYNC_MODE_PLL,
 			   drift);
diff --git a/drivers/dahdi/xpp/xbus-sysfs.c b/drivers/dahdi/xpp/xbus-sysfs.c
index d8c11dc..35180d9 100644
--- a/drivers/dahdi/xpp/xbus-sysfs.c
+++ b/drivers/dahdi/xpp/xbus-sysfs.c
@@ -249,7 +249,7 @@ static DEVICE_ATTR_READER(driftinfo_show, dev, buf)
 	/*
 	 * Calculate lost ticks time
 	 */
-	seconds = ktime_ms_delta(now, di->last_lost_tick) / 1000;
+	seconds = div_s64(ktime_ms_delta(now, di->last_lost_tick), 1000);
 	minutes = seconds / 60;
 	seconds = seconds % 60;
 	hours = minutes / 60;
diff --git a/drivers/dahdi/xpp/xframe_queue.c b/drivers/dahdi/xpp/xframe_queue.c
index e986083..8e5e508 100644
--- a/drivers/dahdi/xpp/xframe_queue.c
+++ b/drivers/dahdi/xpp/xframe_queue.c
@@ -35,15 +35,18 @@ static void __xframe_dump_queue(struct xframe_queue *q)
 	int i = 0;
 	char prefix[30];
 	ktime_t now = ktime_get();
+	s64 msec = 0;
+	s32 rem = 0;
 
 	printk(KERN_DEBUG "%s: dump queue '%s' (first packet in each frame)\n",
 	       THIS_MODULE->name, q->name);
 	list_for_each_entry_reverse(xframe, &q->head, frame_list) {
 		xpacket_t *pack = (xpacket_t *)&xframe->packets[0];
 		s64 usec = ktime_us_delta(now, xframe->kt_queued);
+		msec = div_s64_rem(usec, 1000, &rem);
 
-		snprintf(prefix, ARRAY_SIZE(prefix), "  %3d> %5lld.%03lld msec",
-			 i++, usec / 1000, usec % 1000);
+		snprintf(prefix, ARRAY_SIZE(prefix), "  %3d> %5lld.%03d msec",
+			 i++, msec, rem);
 		dump_packet(prefix, pack, 1);
 	}
 }
@@ -52,6 +55,8 @@ static bool __xframe_enqueue(struct xframe_queue *q, xframe_t *xframe)
 {
 	int ret = 1;
 	static int overflow_cnt;
+	s64 msec = 0;
+	s32 rem = 0;
 
 	if (unlikely(q->disabled)) {
 		ret = 0;
@@ -60,11 +65,11 @@ static bool __xframe_enqueue(struct xframe_queue *q, xframe_t *xframe)
 	if (q->count >= q->max_count) {
 		q->overflows++;
 		if ((overflow_cnt++ % 1000) < 5) {
-			NOTICE("Overflow of %-15s: counts %3d, %3d, %3d worst %3d, overflows %3d worst_lag %02lld.%lld ms\n",
+			msec = div_s64_rem(q->worst_lag_usec, 1000, &rem);
+			NOTICE("Overflow of %-15s: counts %3d, %3d, %3d worst %3d, overflows %3d worst_lag %02lld.%d ms\n",
 			     q->name, q->steady_state_count, q->count,
 			     q->max_count, q->worst_count, q->overflows,
-			     q->worst_lag_usec / 1000,
-			     q->worst_lag_usec % 1000);
+			     msec, rem);
 			__xframe_dump_queue(q);
 		}
 		ret = 0;
diff --git a/drivers/dahdi/xpp/xpp_usb.c b/drivers/dahdi/xpp/xpp_usb.c
index 1a591b1..3741457 100644
--- a/drivers/dahdi/xpp/xpp_usb.c
+++ b/drivers/dahdi/xpp/xpp_usb.c
@@ -882,7 +882,7 @@ static void xpp_send_callback(struct urb *urb)
 		usec = 0; /* System clock jumped */
 	if (usec > xusb->max_tx_delay)
 		xusb->max_tx_delay = usec;
-	i = usec / USEC_BUCKET;
+	i = div_s64(usec, USEC_BUCKET);
 	if (i >= NUM_BUCKETS)
 		i = NUM_BUCKETS - 1;
 	xusb->usb_tx_delay[i]++;
-- 
2.33.0

